Is chess.com spamming itself?

Has chess.com hired someone to submit seemly random blog posts, in an attempt to boost site rankings? This is the only explanation that I can think of for some of the posts that have appeared recently. They all seem to be truncated at the same length too - about 340 words or 1920 characters.

The posts look meaningful at first glance, but contain no useful information. For instance there was a post recently that was meant to be an introduction to the subject of blood pressure, but made no mention of systolic and diastolic pressures. This is what alerted me to the phenomenon.